Examine source code of Firefox Plasma ANIMATED

{
  "theme": {
    "images": {
      "theme_frame": "ff-plasma-head.png"
    },
    "colors": {
      "frame": "#b5b1b1",
      "tab_background_text": "#66e3e1"
    }
  },
  "version": "2.0",
  "name": "Firefox Plasma ANIMATED",
  "manifest_version": 2,
  "description": "Animated plasma fox with sky blue text.\nAll the best.\nDay."
}